THE EPIDERMIS. 



iu 



The cells of the epidermis 

 adapted to dry, hot climates 

 are very thick,, and the cells 

 of those adapted only to 

 moist air are thin, while the 

 cells of the same species may 



much ill thickness, de- 



FIG. 15. Sections of a leaf or Featucn oriiia var. 

 sheep's fescue); a, from a plant grown 



-. . ... ohade with plenty of moisture; h, from a 



pending 011 a greater or less Plant grown in greater heat, with much light 

 and little moisture. 1 x 180.-(E. Hackel). 



exposure to light, heat, and moisture. 



FIG. 16. This gives some notion of the appearance of the epidermis of Poa pratenste 

 (June grass); a, cross section of blade; 1>, seen from the upper side; c, over the hypo- 

 dermal fibers; d, rows of stomata; 6, bands of cells over parenchyma. 1x150. (Sud- 

 worth). 



